president obama warned republicans not to try linking the fiscal cliff negotiations to an increase in the federal debt ceiling early next year. timothy geithner says the administration absolutely it prepared to let the economy go over the fiscal cliff unless the republicans accept higher tax rates on the healthy. and the southern philippines struggled to recover from a typhoon that killed nearly 300 people. and what does a day in the life of public buses, trains and subways look like? the answer is part of our science roundup online. hari sreenivasan has the details. >> sreenivasan: the image resembles a lite-bright time lapse. find those pictures and our conversation with a software developer who set out to visualize the 24-hour cycle of urban public transit systems. that's on our homepage. an international telecommunications conference in dubai aims to set new rules for the internet. what's at stake? we take a look in the rundown. and on making sense, economics correspondent paul solman argues both sides of the capital gains tax debate. all that and more is on our website newshour.p